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A Multi-Tone Rectenna System for Wireless Power Transfer

Simone Ciccia, Alberto Scionti, Giuseppe Franco, Giorgio Giordanengo, Olivier Terzo and Giuseppe Vecchi
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Simone Ciccia: Advanced Computing and Application, LINKS Foundation, 10138 Torino, Italy
Alberto Scionti: Advanced Computing and Application, LINKS Foundation, 10138 Torino, Italy
Giuseppe Franco: Advanced Computing and Application, LINKS Foundation, 10138 Torino, Italy
Giorgio Giordanengo: Advanced Computing and Application, LINKS Foundation, 10138 Torino, Italy
Olivier Terzo: Advanced Computing and Application, LINKS Foundation, 10138 Torino, Italy
Giuseppe Vecchi: Department of Electronics and Telecommunications, Politecnico di Torino, 10129 Torino, Italy

Energies, 2020, vol. 13, issue 9, 1-14

Abstract: Battery-less sensors need a fast and stable wireless charging mechanism to ensure that they are being correctly activated and properly working. The major drawback of state-of-the-art wireless power transfer solutions stands in the maximum Equivalent Isotropic Radiated Power (EIRP) established from local regulations, even using directional antennas. Indeed, the maximum transferred power to the load is limited, making the charging process slow. To overcome such limitation, a novel method for implementing an effective wireless charging system is described. The proposed solution is designed to guarantee many independent charging contributions, i.e., multiple tones are used to distribute power along transmitted carriers. The proposed rectenna system is composed by a set of narrow-band rectifiers resonating at specific target frequencies, while combining at DC. Such orthogonal frequency schema, providing independent charging contributions, is not affected by the phase shift of incident signals (i.e., each carrier is independently rectified). The design of the proposed wireless-powered system is presented. The main advantage of the solution is the voltage delivered to the load, which is directly proportional to the number of used carriers. This is fundamental to ensure fast sensor wakes-up and functioning. To demonstrate the feasibility of the proposed system, the work has been complemented with the manufacturing of two rectennas, and the analysis of experimental results, which also validated the linear relationship between the number of used carriers.

Keywords: wireless power transfer; rectennas (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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